By: Sting On: Tue Jan 25, 2011 10:42 am morning KevinThis can be a very interesting project - always more fun if you understand as much or more than the folks you interviewhere is a link to the book I wrote of above <a href="http://store.hydronicpros.com/category.php?qcc=1002&qpg=1This">http://store.hydronicpros.com/category.php?qcc=1002&qpg=1This</a> link is broken, either the page no longer exists or there is some other issue like a typo. it is highly recommended by ano